Filter sleeve



FIG. 1 is a perspective view of a filter sleeve;

FIG. 2 is a top plan view of FIG. 1, the bottom view being a mirror image;

FIG. 3 is a front side view of FIG. 1;

FIG. 4 is a back side view of FIG. 1;

FIG. 5 is a perspective view of a second embodiment of a filter sleeve; different surfaces of the filter sleeve being indicated to contrast in appearance;

FIG. 6 is a top plan view of FIG. 5, the bottom plan view being a mirror image thereof;

FIG. 7 is a front side view of FIG. 5;

FIG. 8 is a back side view of FIG. 5;

FIG. 9 is a perspective view of a third embodiment of a filter sleeve, an outer surface of the sleeve being lined to indicate blue color;

FIG. 10 is a top plan view of FIG. 9, the bottom plan view being a mirror image thereof;

FIG. 11 is a front side view of FIG. 9; and,

FIG. 12 is a back side view of FIG. 9. 

The ornamental design for a filter sleeve, as shown and described. 